Dissociation of quarkonium in a hot QCD medium: Modification of the interquark potential

Agotiya, Vineet Kumar; Chandra, Vinod; Patra, Binoy Krishna

doi:10.1103/physrevc.80.025210

Cited by 68 publications

(118 citation statements)

References 43 publications

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“…So we can obtain the medium-modification to the vacuum potential by correcting its both short and long-distance part with a dielectric function ǫ(p) encoding the effect of deconfinement [58] …”

Section: Potential In a Hot Qcd Mediummentioning

confidence: 99%

“…Recently a heavy quark potential was obtained by correcting both perturbative and nonperturbative terms in the Cornell potential, not its Coulomb part alone, with a dielectric function encoding the effects of the deconfined medium [58]. The inclusion of nonvanishing string term, apart from the Coulomb term made the potential more attractive which can be seen by an additional long range Coulomb term, in addition to the conventional Yukawa term.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, the effects of anisotropy on both real and imaginary part of the heavy-quark potential and subsequently on the dissociation of quarkonia states have been investigated in an anisotropic medium [61,62,63,64,65] extensively. Recently we extended our aforesaid calculation [58] for an isotropic medium to a medium which exhibits a local anisotropy in the momentum space by correcting the full Cornell potential through the hard-loop resumed gluon propagator [66]. The presence of anisotropy introduces an angular dependence, in addition to inter-particle separation, to the potential which is manifested in weakening the screening of the potential.…”

Section: Introductionmentioning

confidence: 99%

“…In the short distance limit, the potential reduces to the vacuum one, i.e., the QQ pair does not see the medium whereas in the large distance limit, potential reduces to a long-range Coulomb potential with a dynamically screened-color charge. Thereafter with this potential, the binding energies and dissociation temperatures of the ground and the lowest-lying states of charmonium and bottomonium spectra have been determined [58,59].…”

Section: Introductionmentioning

confidence: 99%

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Dissociation of quarkonium in a complex potential

2014

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We have studied the quasi-free dissociation of quarkonia through a complex potential which is obtained by correcting both the perturbative and nonperturbative terms of the QQ potential at T=0 through the dielectric function in real-time formalism. The presence of confining nonperturbative term even above the transition temperature makes the real-part of the potential more stronger and thus makes the quarkonia more bound and also enhances the (magnitude) imaginary-part which, in turn contributes more to the thermal width, compared to the medium-contribution of the perturbative term alone. These cumulative observations result the quarkonia to dissociate at higher temperatures. Finally we extend our calculation to a medium, exhibiting local momentum anisotropy, by calculating the leading anisotropic corrections to the propagators in Keldysh representation. The presence of anisotropy makes the real-part of the potential stronger but the imaginary-part is weakened slightly. However, since the medium corrections to the imaginary-part is a small perturbation to the vacuum part, overall the anisotropy makes the dissociation temperatures higher, compared to isotropic medium.

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Section: Potential In a Hot Qcd Mediummentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dissociation of quarkonium in a complex potential

2014

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“…The dissociation of heavy quarkonium derived by the presence of screening of static color fields in hot QCD medium has long been proposed as a signature of a deconfined medium, and QGP formation [2]. Since then, this has been an area of active research [28][29][30][31][32][33][34]. However, a precise definition of the dissociation temperature is still elusive and is a matter of intense theoretical and phenomenological investigations either from the perspective of lattice spectral function studies [33,[35][36][37][38] or potential inspired models [39][40][41][42] or effective quarkonia field theories [43].…”

Section: Introductionmentioning

confidence: 99%

Dissociation of heavy quarkonium in hot QCD medium in a quasiparticle model

et al. 2016

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Following a recent work on the effective description of the equations of state for hot QCD obtained from a Hard thermal loop expression for the gluon self-energy, in terms of the quasi-gluons and quasiquark/anti-quarks with respective effective fugacities, the dissociation process of heavy quarkonium in hot QCD medium has been investigated. This has been done by investigating the medium modification to a heavy quark potential. The medium modified potential has a quite different form (a long range Coulomb tail in addition to the usual Yukawa term) in contrast to the usual picture of Debye screening. The flavor dependence of the binding energies of the heavy quarkonia states and the dissociation temperature have been obtained by employing the debye mass for pure gluonic and full QCD case computed employing the quasi-particle picture. Thus estimated dissociation patterns of the charmonium and bottomonium states, considering Debye mass from different approaches in pure gluonic case and full QCD, have shown good agreement with the other potential model studies. 24.85.+p; 12.38.Mh PACS

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Spectral functions of heavy quarkonia in a bulk-viscous quark gluon plasma

Thakur

Hirono

2022

J. High Energ. Phys.

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We study the properties of quarkonia inside a bulk-viscous quark gluon plasma. The non-equilibrium nature of the medium is encoded in the deformed distribution functions of thermal quarks and gluons, with which we compute the dielectric permittivity within the hard thermal loop approximation at one-loop. The modified dielectric permittivity is used to calculate the in-medium heavy quark potential, and using the potential we compute spectral functions, which reflect the physical properties of heavy quarkonia. We discuss how the bulk viscous effect influences quantities such as binding energies and thermal widths. Based on those properties, we discuss the implications of the bulk viscous effect on the physical observables such as ψ′ to J/ψ ratio and the nuclear modification factor, RAA. In particular, we argue that the nuclear modification factors of excited and ground states show different sensitivities to the bulk viscous nature of a plasma, which is potentially useful for the critical point search.

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Dissociation of quarkonium in a hot QCD medium: Modification of the interquark potential

Cited by 68 publications

References 43 publications

Dissociation of quarkonium in a complex potential

Dissociation of quarkonium in a complex potential

Dissociation of heavy quarkonium in hot QCD medium in a quasiparticle model

Spectral functions of heavy quarkonia in a bulk-viscous quark gluon plasma

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